feat(dashboard): add promotions to campaign UI (#7283)

* feat(core-flows,types,medusa): API to add promotions to campaign

* chore: consolidate specs

* chore: split workflows step into 2

* chore: fix tests

* chore: fix specs

* chore: add promotions to campaign UI

* chore: fix bug wrt to not refreshing

* chore: address review comments

packages/admin-next/dashboard/src/providers/router-provider/route-map.tsx

@@ -237,6 +237,13 @@ export const RouteMap: RouteObject[] = [
                     lazy: () =>
                       import("../../v2-routes/campaigns/campaign-budget-edit"),
                   },
+                  {
+                    path: "add-promotions",
+                    lazy: () =>
+                      import(
+                        "../../v2-routes/campaigns/add-campaign-promotions"
+                      ),
+                  },
                 ],
               },
             ],